<template>
  <div>
      <h1>当前的和为: {{$store.state.sum}}</h1>
      <select v-model.number="n">
          <option value="1">1</option>
          <option value="2">2</option>
          <option value="3">3</option>
      </select>
      <button class="a" @click="increment">+</button>
      <button class="a" @click="decrement">-</button>
      <button @click="incrementOdd">当前和为奇数时再加</button>
      <button @click="incrementWait">等0.6秒再加</button>
  </div>
</template>

<script>
export default {
    name:'Count',
    data(){
        return{
            n:1,
        }
    },
    methods: {
        increment(){
           this.$store.dispatch('add',this.n)
        },
        // 方法一：
        // decrement(){
        //    this.$store.dispatch('jian',this.n)
        // },
        // 方法二：
        decrement(){
           this.$store.commit('JIAN',this.n)
        },
        incrementOdd(){
            this.$store.dispatch('ji',this.n)
        },
        incrementWait(){
            this.$store.dispatch('wait',this.n)       
        }   
    },
}
</script>

<style>
.a{
    width: 50px;
}
button {
    margin-left: 5px;
}
</style>